4437-40-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4437-40-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,4,3 and 7 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 4437-40:
(6*4)+(5*4)+(4*3)+(3*7)+(2*4)+(1*0)=85
85 % 10 = 5
So 4437-40-5 is a valid CAS Registry Number.